Compilare: main.cpp: In function 'void rec(int, int, std::vector<int>&, std::vector<int>&, std::vector<std::pair<int, int> >&)': main.cpp:20:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v.size(); i++) { ~~^~~~~~~~~~ main.cpp:47:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < dusmani.size(); j++) { ~~^~~~~~~~~~~~~~~~